Caroline f64e9dccb4
Restructure Data Prepper plugins documentation (#2073)
* Removed content from Data Prepper reference and broke out into separate pages.

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* Checking in file to make sure it's the right version.

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* Adding Sinks file.

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* Added images and reorganized files.

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* Reconfigured some content based on David's feedback.

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* Modified reference page.

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* Fixed minor heading issue.

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* Major edits, files created, moved, and content broken out from main config page.

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* Adding key value and processors pages to the PR.

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* Basic ToC reorg.

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* Changed filename.

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* Minor ToC updates

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* Making small Toc changes.

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* Minor ToC updates.

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* Added comment blocks for Config and Metrics sections.

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* Minor ToC updates to add Sinks and Sources under config guide.

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Markdown

---
layout: default
title: add_entries
parent: Processors
grand_parent: Configuring Data Prepper
nav_order: 45
---
# add_entries
## Overview
Adds an entry to event. `add_entries` is part of [mutate event](https://github.com/opensearch-project/data-prepper/tree/main/data-prepper-plugins/mutate-event-processors#mutate-event-processors) processors.
Option | Required | Type | Description
:--- | :--- | :--- | :---
entries | Yes | List | List of events to be added. Valid entries are `key`, `value`, and `overwrite_if_key_exists`.
key | N/A | N/A | Key of the new event to be added.
value | N/A | N/A | Value of the new entry to be added. Valid data types are strings, booleans, numbers, null, nested objects, and arrays containing the aforementioned data types.
overwrite_if_key_exists | No | Boolean | If true, the existing value gets overwritten if the key already exists within the event. Default is `false`.
<!--- ## Configuration
Content will be added to this section.
## Metrics
Content will be added to this section.---->